.header {
  @include type-size(500);
  line-height: 1.25;
  font-weight: bold;
  margin-top: 0;
  @media (min-width: $viewport-md) {
    @include type-size(600);
  }
  @media (min-width: $viewport-lg) {
    max-width: 38rem;
    @include type-size(600);
  }
  @media (min-width: $viewport-xl) {
    @include type-size(700);
  }
}
